Patent US3511322A successfully refreshed from Google Patents.
US3511322A
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US
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Percussive hammer with vacuum system for cleaning debris from workpiece
Assignee: Phillips Drill Co Inc
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Filing: 1967-09-14
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Granted: 1970-05-12
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Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Bixby
- 👤 Bruce L Kaufman
- 👤 Harrison R Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:56
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1334430A
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US1821824A
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US2182165A
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US2375689A
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US3022840A
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US3256944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |